Detector device of knitting-machine stop-motions.



H. SWINGLEHURST. DETEGTOR DEVICE 0F KNITTING MACHINE STOP MOTIONS. APPLICATION FILED DEO.17,1912.

1,099,408. Patented June 9, 1914.

UNITED STATES PATENT onrrcn.

HARRY SWINGLEHURST, OF LACONIA, NEW HAMPSHIRE, ASSIGNDR TO SCOTT do WILLIAMS, INGOBPORATED, OF CAMDEN, NEW JERSEY, A CORPORATION" OF NEW JEnsnY.

Specification of Letters Patent.

Patented J nu e S), 1914:.

Application filed December 17, 1912. Serial No. 737,240.

To all whom it may concern:

Be it known that I, IIARRY Swmonnnnnsr, a citizen of the "United States, and a resident of Laconia, in the county of Bellmap and State of New Hampshire, have invented a new and useful Improvement inDetect/or Devices of Knitting-Machine Stop-Motions, of which the following is a specification.

The object of my invention is to provide an improved form of the device shown in the patent to Robert WV. Scott and Harry pwinglehurst No. 679,641, granted J uly 30,

In the accompanying drawings, Figure 1 is a radial vertical section thrpugh so much of a rib knitting'machine as is necessary to illustrate the application of my new device thereto, showing the detector device in side elevation, partly in section; Fig. 2 is an end elevation of the standard and detector; Fig. 3 is a plan showing in dotted lines the position assumed by thedetector elenrlient of the device when it has functionate In the machines "of the type indicated the needle cylinder 2 and dial 3 are relatively stationary with respect to the machine table or bed plate 1, movement being given to the independent needles carried by each of the needle carriers, the needle cylinder 2 and the dial 3, respectively, by cylinder cam 6, carried by a cam carrier 7, and by dial cams not shown, the ring or carrier 7 being the driven element through which movement is imparted to the remainder of the cam structures.

On a support or standard 12 mounted on the ring 7, I provide as in the former patent a vertically movable drop bolt, or slide 18, which I have shown constructed as a round bar movable through holes in the lugs 13 projecting outwardly from the standard 12. Surrounding said bar and beneath the uppermost lug 13 is a light coinprcssion spring 14, the lower end of which acts upon a washer 15 held in place by a pin 16 in. a hole in the bolt 18. I

Mounted to move in an annular groove in;

the bed'p la te 1 is airing 30 having teeth 31 immediately beneath the-lower end of the bolt 18' in said patent, the ring 30 I serves? as a ,trans itter/ or actuator for the let-oil and brake fiieviceswhen it has been picked up, and'mo ed about the center of the nnnrhine by the engagement therewilh'of the bolt 18. i

In the patented device the detector element, shown at 25 in said patent, is pivoted on theuppcr face of the standard 12, about a vertical pivot, so that upon the engagement of the working end thereof with a ball of waste or broken needle, substantially on the line of intersection of the cylinder and dial noodles, the device swings about said vertical pivot to withdraw a part there of from a notch in the bolt 18 and permit it to actuate the ring 30. \Vith this con struction unless the adjustu'ients in the machine are properly made, the outwardly swinging movement of the detector, which penetrates the path of the cylinder needles and takes place directly in the plane in which the dial needles move. will bring the detector into contact with the needles, and damage has at times been occasioned by the presence of the point of the detector in these planes. Further dii'licnlty has arisen from the tendency of the lover or detector shown in said atent to work out of the notch in the bolt, when there has been no fault in the operation of the machine such as to actuate it. \Vhile the detector should be a sensitive instrument, it is very desirable that vibration or other causes short of the condition which it is to detect should not,

affect it so as to cause the machine to stop unnecessarily.

In the structure shown in the drawings, thctop of the standard 12 is inclined with respect to the axis about which the cam carriers rotate, as best shown in Fig. 2, so as to provide a wide bearing surface "for the detector lever 25, which is inclined'to the line of movement of the bolt '18. A shouldered screw 21 in a bore at right angles to the inclined face 26 of the standard 12 serves as a pivot for the lever 2:"), which is provided with an upstanding lug 27 and an edge 28. The bolt 18 is provided with a deep angula r notch 33 in which the edge .28 is seated when the lever 25 is in its adjusted position. The bottom of the notch 33 rests astridc of the edge 28, to prevent the accidental turning of the bolt 18 upon its axis, thus avoiding the necessity for any special structure to prevent rotation of the bolt. The stress oi the spring 14: acting through the upper wall of the slot 33 on the edge 28 of thelcvcr 25 memb holds said lever frictionally against the in clined face 26 of the standard 12, providing a sufficient resistance against accidental movement of the lever 25, without preventing its desired Working movement. The seating of the lever 25 in the notch 33 is further aided by the disposition of the weight of the parts, the inner or detecting end of the lever 25 beingslightly heavier than the inclined portion beyond the axis 24;, enabling gravity to aid in positioning said ers. The detector point proper 32, which is 'made as a curved blade having a roundedand polished end reaching to the line of intersection of the needles, is attached to the lug 27 for vertical adjustment by a screw 29 in a longitudinally slotted hole in a. vertical lug 34 of the point 32, which permits radial adjustment of the point of the device' It will be noticed that the idle position of the lever and the point 32 is in a plane in; terse'cting the angle defined by cooperating cylinder and volial needles, and that the op erative stroke of-the detector carries it well out of the planes of the needles of both sets, where it is in no danger of being encountered. by an abnormally advanced needle. 3 The bolt 18 having been released by the motion device comprisinga drop bolt,-a de tector contacting with said bolt to support it and having a part movable past the needles and near the line of intersection of the surfaces occupied by the needles, and a support upon which said detector is movable having a surface at an acute angle to the path of movement ofsaid bolt, whereby said lever is 'friotionally held against its support to be moved by an obstruction atthe needles and at an angle to the direction of movement of both sets of needles, to release said bolt.

,2. In a stop motion device for knitting machines, comprising a drop bolt,-let-'ofi' devices, and a connection actuated by said bolt to operate the let-oil devices, in combination witha detector lever in contact with said bolt to restrain said boltirommovement, a support having a surface incllned to the path .of movement of the drop bolt, upon which surface said lever is pivoted for movement toward and away from said bolt at an'acute angle to said path of movement, said lever comprising means positioned to encounter an obstruction at the needles of the knitting machine.

3. Ina stop 'mot-ion device'for knitting machines, a drop bolt, a lever mounted-to swing about a pivot inclined with respect to the bolt, means on said bolt to engage said lever in one position, and a detector element vertically and horizontally adjustable upon 7 said lever. i

In testimony whereof, I have signed my name to this specificatlon, 1n the presence of two subscribing witnesses HARRY SWINGLEI-I U'Rsr, Witnesses:

E.. .G. Yon'no, M. G. 'CROZIER. 

